Graphing Quadratics and Vertex Formula

What is the vertex of this parabola?

• (−1, 3)

• (−3, 11)

• (−2, 5)

• (0, 5)

Where is the axis of symmetry for this parabola?

• x = −1

• x = 0

• y = 3

• x = −3

What is the y-intercept of this parabola?

• (−1, 3)

• (−3, 11)

• (−2, 5)

• (0, 5)

What is the axis of symmetry?
f(x) = x² - 8x + 15.

• x = -4

• x = 4

• y = 4

• y = -4

Identify the vertex and whether the graph opens up or down.

• (2, -3); opens up

• (-2, -3); opens down

• (2, 3); opens down

• (-2, 3); opens up

Graph (x + 1)² - 8.

You can drag one dot to the vertex and another to another point on the parabola.

Graph -3(x - 4)² + 1.

You can drag one dot to the vertex and another to another point on the parabola.

Identify the vertex and whether the graph opens up or down.

• (5, 2); opens up

• (5, 2); opens down

• (-5, 2); opens up

• (-5, 2); opens down

Graph -(x + 5)² + 5.

You can drag one dot to the vertex and another to another point on the parabola.

What is the axis of symmetry?
y = 3x² - 6x + 4

• x=1

• x=-6

• x=2

• x=-1